The document discusses identifying idiosyncrasies early in the conversion process from other formats to S1000D. It is important to analyze the source data to understand its structure, inconsistencies, and issues like missing elements or extra text before beginning the conversion. This will help properly scope the project and minimize costly errors later in the process. Identifying things like inconsistent headings, references, or warnings placed in tables early allows developing special rules to correctly structure the data in S1000D.